Services overview and unit files
|
1 2 3 4 5 6 7 8 9 10 11 |
# Show running units systemctl # Show status of OS systemctl status # List all units systemctl list-units # Display failed units: systemctl --failed |
The available unit files can be seen in /usr/lib/systemd/system/ and /etc/systemd/system/
Start / stop
|
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 |
systemctl start unit # samples systemctl start apache2.service # stop systemctl stop apache2.service # restart systemctl restart unit # reload systemctl reload unit # Check whether a unit is already enabled or not: systemctl is-enabled unit # Show the status of a unit, including whether it is running or not: systemctl status unit |
Checking status
By default it should be possible to view the output of every unit using journal – journalctl
|
1 2 |
# Display logs of unit journalctl -u unit |
Enable / disable service
|
1 2 3 4 5 6 7 8 9 10 11 |
# Enable a unit to be started on bootup: systemctl enable unit # Disable a unit to not start during bootup: systemctl disable unit # Mask a unit to make it impossible to start it: systemctl mask unit # Unmask a unit: systemctl unmask unit |
Power management
|
1 2 3 4 5 6 7 8 9 10 11 12 13 14 |
# Reboot systemctl reboot # Shut down and power-off the system: systemctl poweroff # Suspend the system: systemctl suspend # Put the system into hibernation: systemctl hibernate # Put the system into hybrid-sleep state (or suspend-to-both): systemctl hybrid-sleep |
Modifying system
- /usr/lib/systemd/system/: units provided by installed packages
- /etc/systemd/system/: units installed by the system administrator
When you modify the unit file, you always need to run:
|
1 |
systemctl daemon-reload |
See https://wiki.archlinux.org/index.php/systemd for more information
No Comments
You can leave the first : )